From 81d340d40af506eda3182190b6132575547fa4c5 Mon Sep 17 00:00:00 2001
From: Felipe Contreras <felipe.contreras@gmail.com>
Date: Wed, 10 Apr 2013 17:15:52 -0400
Subject: [PATCH] transport-helper: report errors properly
If a push fails because the remote-helper died (with fast-export),
the user may not see any error message. We do correctly die with a
failed exit code, as we notice that the helper has died while
reading back the ref status from the helper. However, we don't print
any message. This is OK if the helper itself printed a useful error
message, but we cannot count on that; let's let the user know that
the helper failed.
In the long run, it may make more sense to propagate the error back
up to push, so that it can present the usual status table and give a
nicer message. But this is a much simpler fix that can help
immediately.
While we're adding tests, let's also confirm that the remote-helper
dying is also detected when importing refs. We currently do so
robustly when the helper uses the "done" feature (and that is what
we test). We cannot do so reliably when the helper does not use the
"done" feature, but it is not even worth testing; the right solution
is for the helper to start using "done".
Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Sverre Rabbelier <srabbelier@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
git-remote-testgit | 19 +++++++++++++++++++
t/t5801-remote-helpers.sh | 20 ++++++++++++++++++++
transport-helper.c | 2 +-
3 files changed, 40 insertions(+), 1 deletion(-)
diff --git a/git-remote-testgit b/git-remote-testgit
index b395c8de59c..5fd09f965a6 100755
--- a/git-remote-testgit
+++ b/git-remote-testgit
@@ -61,12 +61,31 @@ do
echo "feature import-marks=$gitmarks"
echo "feature export-marks=$gitmarks"
fi
+
+ if test -n "$GIT_REMOTE_TESTGIT_FAILURE"
+ then
+ echo "feature done"
+ exit 1
+ fi
+
echo "feature done"
git fast-export "${testgitmarks_args[@]}" $refs |
sed -e "s#refs/heads/#${prefix}/heads/#g"
echo "done"
;;
export)
+ if test -n "$GIT_REMOTE_TESTGIT_FAILURE"
+ then
+ # consume input so fast-export doesn't get SIGPIPE;
+ # git would also notice that case, but we want
+ # to make sure we are exercising the later
+ # error checks
+ while read line; do
+ test "done" = "$line" && break
+ done
+ exit 1
+ fi
+
before=$(git for-each-ref --format='%(refname) %(objectname)')
git fast-import "${testgitmarks_args[@]}" --quiet
diff --git a/t/t5801-remote-helpers.sh b/t/t5801-remote-helpers.sh
index f387027c05c..aafc46ac94a 100755
--- a/t/t5801-remote-helpers.sh
+++ b/t/t5801-remote-helpers.sh
@@ -166,4 +166,24 @@ test_expect_success 'push ref with existing object' '
compare_refs local dup server dup
'
+test_expect_success 'proper failure checks for fetching' '
+ (GIT_REMOTE_TESTGIT_FAILURE=1 &&
+ export GIT_REMOTE_TESTGIT_FAILURE &&
+ cd local &&
+ test_must_fail git fetch 2> error &&
+ cat error &&
+ grep -q "Error while running fast-import" error
+ )
+'
+
+test_expect_success 'proper failure checks for pushing' '
+ (GIT_REMOTE_TESTGIT_FAILURE=1 &&
+ export GIT_REMOTE_TESTGIT_FAILURE &&
+ cd local &&
+ test_must_fail git push --all 2> error &&
+ cat error &&
+ grep -q "Reading from remote helper failed" error
+ )
+'
+
test_done
diff --git a/transport-helper.c b/transport-helper.c
index cb3ef7d38e4..96081cc392e 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -54,7 +54,7 @@ static int recvline_fh(FILE *helper, struct strbuf *buffer)
if (strbuf_getline(buffer, helper, '\n') == EOF) {
if (debug)
fprintf(stderr, "Debug: Remote helper quit.\n");
- exit(128);
+ die("Reading from remote helper failed");
}
if (debug)